The correct option is C When they happen over a large area
Food security can be influenced by factors that are not within our control. For example, natural disasters or calamities like earthquakes, droughts, floods, tsunamis, widespread failure of crops, etc. can affect the food security of the people living above and below the poverty line. Moreover, when a calamity happens over a large area or continues for a very long period, it may compromise the food security of that region.